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Sayaka Ishii
- Land
- Japan
- Geburtsdatum
- 2005-08-31
- Ranking WTA
- 588 · 78 Punkte
- Live-Ranking
- 580 · 78 Punkte
- Ranking WTA (Doppel)
- 756 · 70 Punkte
- Saison 2026
- 5–5
Letzte Matches
| Datum | Turnier | Runde | Gegner | Ergebnis | Ausgang |
|---|
| 2026-09-26 | Nanao | SF | Hiromi Abe | 3-6 2-6 | Niederlage |
| 2026-09-25 | Nanao | QF | Rion Itaya | 6-2 6-0 | Sieg |
| 2026-09-24 | Nanao | R16 | Natsumi Kawaguchi | 5-7 6-2 | Sieg |
| 2026-09-23 | Nanao | R32 | Nagi Hanatani | 6-2 | Sieg |
| 2026-09-22 | Nanao | R16 | Rira Kosaka | 6-3 6-1 | Sieg |
| 2026-09-21 | Nanao | R32 | Miku Suzuki | 6-0 6-0 | Sieg |
| 2026-07-08 | Newport | R1 | Kayla Cross | 2-6 3-6 | Niederlage |
| 2026-06-23 | Wimbledon | | Kaitlin Quevedo | 0-6 3-6 | Niederlage |
| 2026-06-07 | Ilkley | R1 | Vendula Valdmannova | 3-6 1-6 | Niederlage |
| 2026-05-30 | Birmingham | R1 | Vendula Valdmannova | 6-3 2-6 4-6 | Niederlage |
| 2025-07-11 | Newport | QF | Tatjana Maria | 3-6 1-6 | Niederlage |
| 2025-07-09 | Newport | R2 | Destanee Aiava | 3-6 6-3 6-3 | Sieg |
| 2025-07-07 | Newport | R1 | Hanna Chang | 6-1 4-6 7-5 | Sieg |
| 2025-06-24 | Wimbledon | | Kathinka von Deichmann | 5-7 1-6 | Niederlage |
| 2025-06-09 | Ilkley | R2 | Valentina Ryser | 4-6 5-7 | Niederlage |
| 2025-06-08 | Ilkley | R1 | Alana Smith | 6-1 1-6 6-2 | Sieg |
| 2025-06-03 | Birmingham | R1 | Sijia Wei | 3-6 4-6 | Niederlage |
| 2025-06-01 | Birmingham | R2 | Arianne Hartono | 3-6 7-6(3) 6-3 | Sieg |
| 2025-05-31 | Birmingham | R1 | Amelia Rajecki | 6-4 6-4 | Sieg |
| 2025-05-19 | Roland Garros | | Panna Udvardy | 2-6 1-6 | Niederlage |
| 2025-03-19 | Miami | R1 | Emma Raducanu | 2-6 1-6 | Niederlage |
| 2025-01-08 | Australian Open | | Sachia Vickery | 6-7(7) 4-6 | Niederlage |
| 2025-01-07 | Australian Open | | Aoi Ito | 6-3 6-4 | Sieg |
| 2024-12-30 | Canberra | R2 | Oksana Selekhmeteva | 7-6(2) 3-6 3-6 | Niederlage |
| 2024-12-29 | Canberra | R1 | Dalila Jakupovic | 6-4 6-3 | Sieg |